Question

Parathyroid maintains the calcium level in the blood by action on which of the following organs?

• A. Bone
• B. Kidney
• C. Intestine
• D. All of the above

Answer 1

The correct option is D All of the above

• Parathyroid hormone regulates calcium levels in the blood, largely by increasing the levels when they are too low.
• It does this through its actions on the kidneys, bones and intestine.
• Bone parathyroid hormone stimulates the release of calcium from large calcium stores in the bones into the bloodstream. Hence, Parathyroid maintains the calcium level in the blood by action on Bone, Kidney and Intestine.
So, the correct answer is 'All of the above'.